by
Lial, Margaret L.; Hornsby, John; McGinnis, Terry

Answer

0

Work Step by Step

According to page 267, $a^{0}=1$ (where $a$ is a nonzero real number). In other words, we know that any nonzero real number raised to a power of 0 will equal 1.
Therefore, $-5^{0}+5^{0}=-(5^{0})+5^{0}=-(1)+1=-1+1=0$.
Recall that the base of the first exponent is 5 and not -5.